It was decided a while ago that we wouldn't be adding many more recolours (unless they were extremely high quality), and cmp hates armors that mix & match meshes from various other armors. One of the things we look for in new meshes, is whether or not it will blend in well with a large number of pre-existing items. We have to check whether or not many items in crpg will for example, clip through large parts of the new mesh (necks/wrists/knees.) We have to check to make sure the bump/spec maps are properly designed for the armor (there was a bit of a backlash with some armors not adhering to this, recently.) Then of course we always have to check to make sure the items are realistic (Afina's previous post would utterly fail that test, for example).
Edit: Some of those new plate sets could probably be added.